CAFC Orders En Banc Hearing on Dictionaries for Patent Claim Construction, Amicus Briefs Due in 60 Days

This court has determined to hear this case en banc in order to resolve issues concerning the construction of patent claims raised by the now-vacated panel majority and dissenting opinions.  The parties are invited to submit additional briefs directed to these issues, with respect particularly to the following questions:

1. Is the public notice function of patent claims better served by referencing primarily to technical and general purpose dictionaries and similar sources to interpret a claim term or by looking primarily to the patentee’s use of the term in the specification?   If both sources are to be consulted, in what order?
2. If dictionaries should serve as the primary source for claim interpretation, should the specification limit the full scope of claim language (as defined by the dictionaries) only when the patentee has acted as his own lexicographer or when the specification reflects a clear disclaimer of claim scope?  If so, what language in the specification will satisfy those conditions?  What use should be made of general as opposed to technical dictionaries?  How does the concept of ordinary meaning apply if there are multiple dictionary definitions of the same term?  If the dictionary provides multiple potentially applicable definitions for a term, is it appropriate to look to the specification to determine what definition or definitions should apply?
3. If the primary source for claim construction should be the specification, what use should be made of dictionaries? Should the range of the ordinary meaning of claim language be limited to the scope of the invention disclosed in the specification, for example, when only a single embodiment is disclosed and no other indications of breadth are disclosed?
4. Instead of viewing the claim construction methodologies in the majority and dissent of the now-vacated panel decision as alternative, conflicting approaches, should the two approaches be treated as complementary methodologies such that there is a dual restriction on claim scope, and a patentee must satisfy both limiting methodologies in order to establish the claim coverage it seeks?
5. When, if ever, should claim language be narrowly construed for the sole    purpose of avoiding invalidity under, e.g., 35 U.S.C. §§ 102, 103 and 112?
6. What role should prosecution history and expert testimony by one of ordinary skill in the art play in determining the meaning of the disputed claim terms?
7. Consistent with the Supreme Court’s decision in Markman v. Westview Instruments, Inc., 517 U.S. 370 (1996), and our en banc decision in Cybor Corp. v. FAS Technologies, Inc., 138 F.3d 1448 (Fed. Cir. 1998), is it appropriate for this court to accord any deference to any aspect of trial court claim construction rulings?  If so, on what aspects, in what circumstances, and to what extent?

This case will be heard en banc on the basis of the briefs already filed and any additional briefs addressing the questions set forth above.  Amicus curiae briefs may be filed by bar associations, trade or industry associations, government entities, and other interested parties.  Amicus briefs shall be limited to 5,000 words, and shall be filed within sixty days from the date of this Order.